#include <bits/stdc++.h>
#include <atcoder/all>
using mint = atcoder::static_modint<998244353>;
//using mint = atcoder::static_modint<1000000007>;
using namespace std;
using namespace atcoder;
using ld = long double;
using ll = long long;
#define mp(a,b) make_pair(a,b)
#define rep(i,s,n) for(int i=s; i<n; i++)
const vector<int> dx{1,0,-1,0},dy{0,1,0,-1};

vector<vector<int>> G(200000);

string m="meth",head="(",tail="yl)";

void dfs(int x,int p){
    for(auto y:G[x])if(y!=p){
        cout << head;
        dfs(y,x);
        cout << tail;
    }
    if(x==0)cout<<"methane";
    else cout << m;
}
int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int n;
    cin >> n;
    rep(i,0,n){
        char c;
        rep(j,0,4){
            cin >> c;
            if(c!='H'){
                G[i].push_back(c-'1');
            }
        }
    }
    // rep(i,0,n){
    //     cout << i << "\n";
    //     for(auto x:G[i])cout << x << " ";
    //     cout <<"\n";
    // }
    dfs(0,-1);
}